ZeroErr eCoder18 RS485 Absolute Magnetic Ring Encoder, 18 mm Bore
Axial-reading off-axis ring + readhead absolute encoder from ZeroErr, 18 mm bore; sits between the listed eCoder11 and eCoder20 for small humanoid and arm joints.
Specifications
| Resolution | up to 19 bit (series 17 to 21 bit options); 16 bit multiturn counter option |
|---|---|
| Accuracy | max absolute tolerance <0.06° (retailer copy of ZeroErr table); repeatability ±10" |
| Max speed | 12,000 rpm |
| Interface | Asynchronous serial RS485 (8-pin connector) |
| Form | off-axis ring kit: magnetic ring + readhead (360° arc readhead) |
| Sensing | magnetic, axial reading (sensor type not stated) |
| Supply | 4.7 V to 5.4 V (retailer copy of ZeroErr table) |
| Bore / ring ID | 18 mm ring ID |
| Outer diameter | 33.5 mm ring OD; readhead OD 34 mm |
| Multiturn | optional, battery-backed counter (3.6 V battery) |
| Operating temp | -40 to +85 °C (ZeroErr page) |
Who makes it
Need a different shaft, connector, firmware or enclosure, or a price at 1,000 units? Maglev takes the catalog part to the factory and comes back with a custom version and one fixed price.
Landed cost in the US
Total US duty on this part by where it is made (2026-10-29). Mexico shown before USMCA preference; qualifying goods enter duty free. Your factory choice, not the shipping port, sets the origin.
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Compliance
| HTS classification | 9031.80.80.85 typical, not a ruling |
|---|---|
| NDAA | unknown |
| Blue UAS | unknown |
| FCC | n/a |
Equivalents from other makers
Sources
- https://en.zeroerr.cn/magnetic_encoders/ecoder18official product data: bore, OD, thickness, resolution, repeatability, speed, RS485, temp
- https://aifitlab.com/products/zeroerr-ecoder18-magnetic-encodersretailer: USD prices per variant, availability, accuracy/supply table, images
- https://dl.zeroerr.cn/static/en/ZeroErr_eCoder_Manual_Ver2.6.pdfeCoder manual
Record confidence: VERIFIED. VERIFIED means the maker's own documents; REPORTED means a credible third party; UNVERIFIED means a single weak source. Anything we could not confirm says unknown.